It is just a question of usage. For "fruit" there is both an uncountable form - fruit - and a countable form - fruits. You can substitute "fruit" in your first sentence ... or "other types of fruit" (which is what "fruits" always means). In the same way you can talk about "cheeses", "meats" (as in "a selection of cold meats", "a range of cheeses"), even though "cheese" and "meat" are also typically used as uncountable nouns. However, it just so happens that "furniture" (uncountable) doesn't have a countable form any more (it used to in the eighteenth century).

The latter is also supported. We can use the plural forms of various pieces of furniture. Please note that the word "furniture" is an uncountable noun and you shouldn't add plural "s" to it. You gotta look the word up in the dictionary to find out whether it's countable or uncountable. English is full of exceptions! 😉